A ruthless All Blacks retained the Bledisloe Cup for an 18th straight year Saturday, blitzing a young Australian team 43-5 to reinforce their trans-Tasman dominance. After winning 27-7 in Auckland, which followed a tense 16-16 draw in Wellington, they accomplished their mission emphatically in Sydney with one match of the series to go next week. Richie Mo'unga bagged 23 points to ensure bragging rights went to New Zealand coach Ian Foster, who like his opposite number Dave Rennie is in charge for his first Bledisloe Cup tournament. mp/th